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Adaptation/GUID-A25FFD79-0797-43EC-8975-8C23E7E539C4.dita
author Graeme Price <GRAEME.PRICE@NOKIA.COM>
Fri, 15 Oct 2010 14:32:18 +0100
changeset 15 307f4279f433
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License
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"Eclipse Public License v1.0" which accompanies this distribution,
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors:
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-A25FFD79-0797-43EC-8975-8C23E7E539C4" xml:lang="en"><title>Register Access Technology Guide</title><shortdesc>Provides information about the Register Access technology.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>The Register Access platform service is implemented in the ASSP
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layer. The Register Access functionality is provided to the clients
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by implementing the <xref href="GUID-66BB033A-3386-3913-9A25-EF3867D42C2C.dita"><apiname>AsspRegister</apiname></xref> class.</p>
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<section id="GUID-F80CF14A-3CB2-41B1-A3BD-DBD116FDBA8C-GENID-1-2-1-10-1-5-1-8-1-1-7-1-3-2">
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   <title>Purpose</title>             <p>The Register Access platform
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service provides an interface to the kernel and device drivers to
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read, write or modify the contents of only the ASSP registers.</p>  </section>
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<section id="GUID-59E2379C-CD1F-4ABD-A380-2195651D1443"><title>Key
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concepts</title><dl>
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<dlentry>
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<dt>Register</dt>
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<dd><p>A register is a memory location on the ASSP hardware to store
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data that relates to the operation of that hardware. The Symbian platform
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support registers that can store 8, 16, 32 and 64–bit data.</p></dd>
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</dlentry>
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<dlentry>
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<dt>Bitmask</dt>
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<dd><p>The <codeph>Modify</codeph> function of the AsspRegister class
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allows the clients to set or clear certain bits stored in the register.</p></dd>
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</dlentry>
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<dlentry>
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<dt>Application-Specific Standard Product (ASSP)</dt>
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<dd><p>ASSP is an integrated circuit consisting of CPU, Memory Management
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Unit (MMU), cache and a number of on-chip peripherals, which is intended
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to be used in a class of devices. Typical examples include UARTs,
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timers, LCD controller that are designed and marketed by a silicon
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vendor.</p></dd>
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</dlentry>
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</dl></section>
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<section id="GUID-44AD8B68-B9AF-472A-A4E5-6102B3767E97"><title>Typical
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uses</title><p>The Register Access platform service allows the clients
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to:</p><ul>
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<li><p>read data stored in 8, 16, 32 and 64–bit registers</p></li>
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<li><p>store data in 8. 16, 32 and 64–bit registers</p></li>
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<li><p>change certain bits of the data in 8, 16, 32 and 64–bit registers.</p></li>
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</ul></section>
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</conbody></concept>
FCL/sftools/depl/docscontent